What comes after N? In the alphabet, that would be O. In the world of Wi-Fi standards, the answer is ac. Buffalo’s AirStation AC1300 N900 dual-band router and AirStation AC1300 N450 dual-band bridge are based on the second revision of the not-yet-final 802.11ac standard, which promises Gigabit Ethernet speeds wirelessly, up to 1300Mbps maximum on the 5GB band and 450Mbps on the 2.4GHz band.